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Attempt #1 to add horizontal panning with mouse-wheel.

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This commit is contained in:
Mark Watkins 2013-01-18 22:23:00 +10:00
parent 57eaca4ed5
commit 75cb7498fb
1 changed files with 60 additions and 2 deletions
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62
Graphs/gGraphView.cpp
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@ -1694,6 +1694,11 @@ void gGraph::wheelEvent(QWheelEvent * event)
{
//qDebug() << m_title << "Wheel" << event->x() << event->y() << event->delta();
//int y=event->pos().y();
if (event->orientation() == Qt::Horizontal) {
return;
}
int x=event->pos().x()-m_graphview->titleWidth;//(left+m_marginleft);
if (event->delta()>0) {
ZoomX(0.75,x);
@ -3513,8 +3518,61 @@ void gGraphView::wheelEvent(QWheelEvent * event)
py+=graphSpacer; // do we want the extra spacer down the bottom?
}
} else {
m_scrollbar->SendWheelEvent(event); // Just forwarding the event to scrollbar for now..
m_tooltip->cancel();
// Vertical Scrolling
if (event->orientation()==Qt::Vertical) {
m_scrollbar->SendWheelEvent(event); // Just forwarding the event to scrollbar for now..
m_tooltip->cancel();
} else {
//Horinontal Panning
gGraph *g=NULL;
int group=0;
// Pick the first valid graph in the primary group
for (int i=0;i<m_graphs.size();i++) {
if (m_graphs[i]->group()==group) {
if (!m_graphs[i]->isEmpty() && m_graphs[i]->visible()) {
g=m_graphs[i];
break;
}
}
}
if (!g) {
for (int i=0;i<m_graphs.size();i++) {
if (!m_graphs[i]->isEmpty()) {
g=m_graphs[i];
group=g->group();
break;
}
}
}
if (!g) return;
double xx=(g->max_x-g->min_x);
double zoom=240.0;
int delta=event->delta();
if (delta > 0)
g->min_x-=(xx/zoom)*fabs(delta);
else
g->min_x+=(xx/zoom)*fabs(delta);
g->max_x=g->min_x+xx;
if (g->min_x < g->rmin_x) {
g->min_x=g->rmin_x;
g->max_x=g->rmin_x+xx;
}
if (g->max_x > g->rmax_x) {
g->max_x=g->rmax_x;
g->min_x=g->max_x-xx;
}
SetXBounds(g->min_x,g->max_x,group);
}
}
}